How long will he be mad at me?

[Geminithe90s]

So, not to long ago a guy told me he liked me, so now we are talking but lastnight we got into our first argument, i was telling him how im not sure what to get him for valentines day, and all he respond was "oh thats nice" so that was very rude to me so i was like "dont be rude to me" and i signed off, then on twitter he posted up some subliminal messages like "i think she is mad at me" and "i lost alot of respect for you" it was directed towards me specifically, but i sure it was, so i messeaged him saying "you seem upset" then he replied saying "i really dont want to talk right now" so i was really upset cause i felt it was my fault, , i know on the surface it wont work, but i really like him,and i want it to work, so how long will you think he will be angry with me? and what should i say or do? to get him to forgive me?